2D-SEISMICREFLECTION DATA STRUCTURAL INTERPRETATION, RESERVOIR CHARACTERIZATION USING WIRELINE DATA, VELOCITY ANALYSIS, FACIES ANALYSIS AND SEISMIC ATTRIBUTE OF BITRISAM AREA

Abstract

The study area is Block of BITRISM and is located in Sindh province of Pakistan. It is present at the boundary of lower and central Indus Basin. The study area covers 2D vintage (1994) seismic time profile data of eight migrated seismic lines (SEG-Y Format) and seven wells (LAS files). The area has been identified as extensional regime. The main reservoir in the area is sui-main limestone Formation. Geophysical study includes the interpretation of seismic time profiles.Tree horizons i.e.Laki, Sui-main Limestone, Upper Ranikot, Formation are marked on the seismic sections with the help of well top data and synthetic seismogram of Ichrey 01 well. On the interpreted seismic sections, the horst and Graben structures are observe, Time and depth contours and surface maps of Top of Laki, Sui-Limeston, Upper ranikot Formations also confirmed these Horst andGraben.Models of elastic properties derived from the sonic velocity of different wells confirm that formations are suitable for hydrocarbon accumulation e.gVp/Vs ratio and Poisson’s ratio indicate the hydrocarbon accumulation zone where these ratio have high values. Petro physical studies of include the determination of the porosities, resistivity of water, saturationof water, movable hydrocarbons net to gross ratio, porosity, saturation shale volume cut off. Theresults show the presence of clean Sandstone and Gas with high porosity in the productivezones.